Thanks a lot  @Neha Ahlawat

I'll try to post on this feed any ideas I have when I can explain them clearly.  I'm working quite a lot with soql tooling and standard as I need them to find the technical debt of my orgs. This is the best tool I have to make big jump and then I refine the result with the metadata api when I don't have any other choices :)  One thing that could really help regarding the tooling Api would be to modify the lastModifiedDate and the LastModifier whenever a metadata is modified indirectly. Example , changing a picklist on a field will be only seen through the auditTrail. And same for the recordType which is tricky as not everyone can use scratch org or source tracked sandbox to follow what's happening. And to monitor production , there is no such option :)  @Kris Harrison The other thing that could help would be if possible to add the fullName of the metadata modified within the audittrail as a new colum :) So that parsing the audittrail would become easier :)  And if you need to new ideas, feel free to contact me :)